Emkhakheni wemishini yezimboni, ukuqinisekisa ubuqotho bemishini ejikelezayo namaphampu kubaluleke kakhulu. Izivalo zemishini zisebenza njengezingxenye ezibalulekile ekugcineni lobu buqotho ngokuvimbela ukuvuza nokuqukatha uketshezi. Ngaphakathi kwale nsimu ekhethekile, kunezindlela ezimbili eziyinhloko zokulungisa: eyodwa kanyeizivalo ezimbili zemishiniUhlobo ngalunye lunikeza izinzuzo ezihlukile futhi luhlangabezana nezidingo ezithile zokusebenza. Lesi sihloko sihlola izici ezihlukile phakathi kwalezi zixazululo ezimbili zokuvala, sichaza ukusebenza kwazo, izinhlelo zokusebenza, kanye nezinzuzo.
KuyiniUphawu Olulodwa Lwemishini?
Isivalo esisodwa somshini sakhiwe yizingxenye ezimbili eziyinhloko—ukujikeleza kanyeubuso bophawu obungaguqukiUbuso besivalo esijikelezayo bunamathele kushafti ojikelezayo kuyilapho ubuso obungashukumi bunamathele endlini yepompo. Laba bobabili ubuso bucindezelwa ndawonye ngomshini wesipilingi obenza bakwazi ukudala isivalo esiqinile esivimbela uketshezi ukuthi lungavuzi emshaftini.
Izinto ezibalulekile ezisetshenziswa kulezi zindawo zokuvala ziyahlukahluka, kanti izinketho ezivamile ziyi-silicon carbide, i-tungsten carbide, i-ceramic, noma i-carbon, evame ukukhethwa ngokusekelwe ezicini zoketshezi lwenqubo kanye nezimo zokusebenza ezifana nokushisa, ingcindezi, kanye nokuhambisana kwamakhemikhali. Ngaphezu kwalokho, ifilimu yokugcoba yoketshezi olupompiwe ivame ukuhlala phakathi kobuso bophawu ukuze kuncishiswe ukuguguleka nokuklebhuka—isici esibalulekile ekugcineni isikhathi eside.
Izivalo zomshini ezilodwa zivame ukusetshenziswa ezisetshenziswa lapho ingozi yokuvuza ingabi yingozi enkulu yokuphepha noma ukukhathazeka ngemvelo. Ukwakheka kwazo okulula kuvumela ukufakwa kalula futhi kwehlise izindleko zokuqala uma kuqhathaniswa nezixazululo zokuvala eziyinkimbinkimbi kakhulu. Ukugcina lezi zivalo kuhilela ukuhlolwa njalo kanye nokufakwa kwezinye ngezikhathi ezinqunyiwe ukuze kuvinjelwe ukuphuka okubangelwa ukuguguleka okuvamile.
Ezindaweni lapho izindlela zokuvala ezidinga kakhulu khona—lapho kungekho khona uketshezi olunamandla noma oluyingozi—izivalo zomshini ezilodwa zinikeza ukusebenza kahleisixazululo sokuvalaukufaka isandla emijikelezweni yempilo yemishini ende ngenkathi kugcinwa imikhuba yokulungisa ilula.
Incazelo Yesici
Izingxenye Eziyinhloko Ubuso besivalo esijikelezayo (eshafini), Ubuso besivalo esingashintshi (esihlalweni sephampu)
Izinto zokwakha i-Silicon carbide, i-Tungsten carbide, i-Ceramic, i-Carbon
Indlela Egcwele Intwasahlobo Enobuso Obucindezelwe Buhlangene
Ifilimu yoketshezi phakathi kobuso ne-Seal Interface
Izicelo Ezivamile Uketshezi/izinqubo eziyingozi kancane lapho ingozi yokuvuza incane khona
Izinzuzo Umklamo olula; Ukulula kokufakwa; Izindleko eziphansi
Izidingo Zokulungisa Ukuhlolwa okuvamile; Ukushintshwa ngezikhathi ezithile ezibekiwe
uphawu olulodwa lwemishini yentwasahlobo e1705135534757
Kuyini i-Double Mechanical Seal?
I-double mechanical seal inezimbobo ezimbili ezihlelwe ngochungechunge, futhi ibizwa nangokuthi i-double cartridge mechanical seal. Lo mklamo unikeza ukugcinwa okuthuthukisiwe koketshezi oluvalwayo. Izimbobo ezimbili zivame ukusetshenziswa ezisetshenziswa lapho ukuvuza komkhiqizo kungaba yingozi emvelweni noma ekuphepheni kwabasebenzi, lapho uketshezi lwenqubo lubiza khona futhi ludinga ukulondolozwa, noma lapho uketshezi kunzima ukuluphatha futhi lungaqina noma luqine lapho luthintana nezimo zomkhathi.
Lezi zivalo zomshini zivame ukuba ne-inboard kanye ne-outboard seal. I-inboard seal igcina umkhiqizo ngaphakathi kwephampu ngenkathi i-outboard seal imi njengesithiyo sokusekela ukuphepha nokuthembeka okwandisiwe. Izivalo ezimbili zivame ukudinga uketshezi lwe-buffer phakathi kwazo, olusebenza njengesithambisi kanye nesipholile ukunciphisa ukushisa kokungqubuzana - okwandisa isikhathi sokuphila kwezivalo zombili.
Uketshezi lwe-buffer lungaba nezindlela ezimbili: olungacindezelwanga (olwaziwa ngokuthi uketshezi lwesithiyo) noma olucindezelwe. Ezinhlelweni ezicindezelwe, uma uphawu lwangaphakathi luhluleka, akufanele kube khona ukuvuza okusheshayo ngoba uphawu lwangaphandle luzogcina ukuvaleka kuze kube yilapho kungenzeka ukulungiswa. Ukuqapha njalo lolu ketshezi lwesithiyo kusiza ukubikezela ukusebenza kwesithiyo kanye nokuphila isikhathi eside.
Incazelo Yesici
Isixazululo sokuvala esinomkhawulo ophezulu wezinkinga
Idizayini Izimpawu ezimbili ezihlelwe ngochungechunge
Ukusetshenziswa Izindawo eziyingozi; ukulondolozwa koketshezi olubizayo; ukuphatha uketshezi olunzima
Izinzuzo Ukuphepha okuthuthukisiwe; amathuba okuvuza ancishisiwe; okungenzeka kwandise isikhathi sokuphila
Isidingo Soketshezi Lwe-Buffer Kungaba okungacindezelwanga (uketshezi oluvimbelayo) noma okucindezelwe
Ukuphepha Kunikeza isikhathi sokulungisa ngaphambi kokuba kube nokuvuza ngemva kokwehluleka
uphawu oluphindwe kabili lwemishini 500×500 1
Izinhlobo Zezimpawu Ezimbili Zemishini
Ukumiswa kwe-seal ephindwe kabili kwenzelwe ukuphatha izinselele zokuvala ezidinga kakhulu kune-seal eyodwa ye-mechanical. Lokhu kumiswa kufaka phakathi ukuhlelwa kwe-back to back, face to face kanye ne-tandem, ngayinye inokusetha nokusebenza kwayo okuhlukile.
1. Buyela emuva emuva uphawu lwemishini oluphindwe kabili
I-seal ephindwe kabili engemuva nengemuva inezimbobo ezimbili ezihleliwe ngendlela yokuhlela engemuva nengemuva. Lolu hlobo lwe-seal lwenzelwe izinhlelo ezithile lapho kusetshenziswa uhlelo loketshezi oluvimbelayo phakathi kwezimbobo ukuze lunikeze ukuthambisa nokususa noma yikuphi ukushisa okubangelwa ukungqubuzana.
Ngokuhlela okungemuva nokwangemuva, uphawu lwangaphakathi lusebenza ngaphansi kwezimo zokucindezela ezifanayo nomkhiqizo ovalwa, kuyilapho umthombo wangaphandle unikeza uphawu lwangaphandle uketshezi oluvimbelayo ngokucindezela okuphezulu. Lokhu kuqinisekisa ukuthi kuhlale kunengcindezi enhle ngokumelene nobuso bobubili bophawu; ngaleyo ndlela, kuvimbela uketshezi lwenqubo ukuthi lungangeni endaweni ezungezile.
Ukusetshenziswa komklamo wesivalo esingemuva kuya emuva kungasiza izinhlelo lapho ukucindezeleka okuphambene kuyinkinga noma lapho ukugcina ifilimu yokuthambisa eqhubekayo kubalulekile ekugwemeni izimo zokusebenza ezomile. Zifaneleka kakhulu ekusetshenzisweni kokucindezela okuphezulu, okuqinisekisa ukuthembeka nokuphila isikhathi eside kohlelo lokuvala. Ngenxa yomklamo wazo oqinile, ziphinde zinikeze ukuvikeleka okwengeziwe ekuguqulweni kwengcindezi yesistimu okungalindelekile okungase kubeke engcupheni ubuqotho besivalo esisodwa somshini.
Ukuhlelwa kwesivalo esiphindwe kabili esibhekene ubuso nobuso, okwaziwa nangokuthi isivalo esihlanganisiwe, kwaklanywa ngobuso obubili obuphikisanayo obubekwe ngendlela yokuthi izivalo zangaphakathi nezengaphandle zithintane ngobuso bazo obuyisicaba. Lolu hlobo lwesistimu yesivalo luwusizo kakhulu lapho kubhekwana nokusetshenziswa komfutho ophakathi lapho uketshezi oluphakathi kwezivalo ludinga ukulawulwa futhi lungaba yingozi uma luvuza.
Enye yezinzuzo ezibaluleke kakhulu zokusebenzisa isivalo somshini esiphindwe kabili esibhekene ubuso nobuso yikhono laso lokuvimbela uketshezi lwenqubo ukuthi lungangeni endaweni ezungezile. Ngokudala isivalo esine-buffer noma uketshezi lwesithiyo phakathi kwezivalo ezimbili ezisicaba ngaphansi kwengcindezi ephansi kunoketshezi lwenqubo, noma yikuphi ukuvuza kuvame ukuya kule ndawo futhi kude nokukhululwa kwangaphandle.
Ukucushwa kuvumela ukuqapha isimo soketshezi oluvimbelayo, okubalulekile ekunakekelweni futhi kuqinisekisa ukuthembeka ngokuhamba kwesikhathi. Njengoba izindlela zokuvuza ezingaba khona zibheke ngaphandle (ohlangothini lomoya) noma ngaphakathi (ohlangothini lwenqubo), kuye ngokuhlukahluka kwengcindezi, opharetha bangathola ukuvuza kalula kunangezinye izilungiselelo zezivalo.
Enye inzuzo ihlobene nokuphila isikhathi eside; lezi zinhlobo zezimbobo zivame ukubonisa isikhathi eside sokuphila ngoba noma yiziphi izinhlayiya ezikhona oketshezini lwenqubo azinawo umthelela omubi kakhulu ezindaweni zokuvala ngenxa yokuma kwazo okulinganiselwe futhi ngoba zisebenza ngaphansi kwezimo ezinzima kakhulu ngenxa yokuba khona koketshezi oluvikelayo.
3. Izivalo Ezimbili Zemishini Ezihlanganisiwe
I-Tandem, noma izivalo ezimbili zemishini ezibhekene ngemuva, ziyizilungiselelo zokuvala lapho izivalo ezimbili zemishini zihlelwe khona ngokulandelana. Lolu hlelo luhlinzeka ngezinga eliphakeme lokuthembeka nokugcina uma kuqhathaniswa nezivalo ezizodwa. Isivalo esiyinhloko siseduze kakhulu nomkhiqizo ovalwe, sisebenza njengesivikelo esiyinhloko ekuvimbeleni ukuvuza. Isivalo sesibili sibekwa ngemuva kwesivalo esiyinhloko futhi sisebenza njengesivikelo esengeziwe.
I-seal ngayinye ngaphakathi kwelungiselelo le-tandem isebenza ngokuzimela; lokhu kuqinisekisa ukuthi uma kukhona ukwehluleka kwe-primary seal, i-seal yesibili iqukethe uketshezi. I-tandem seals ivame ukufaka i-buffer fluid ngengcindezi ephansi kunoketshezi lwenqubo phakathi kwe-seals zombili. Lolu ketshezi lwe-buffer lusebenza kokubili njenge-lubricant kanye ne-coolant, okunciphisa ukushisa kanye nokuguguleka ebusweni be-seal.
Ukuze kugcinwe ukusebenza kahle kwezivalo ezimbili zemishini ezihlanganisiwe, kubalulekile ukuba nezinhlelo zokusekela ezifanele ukulawula indawo ezizungezile. Umthombo wangaphandle ulawula izinga lokushisa kanye nengcindezi yoketshezi lwe-buffer, kuyilapho izinhlelo zokuqapha zilandelela ukusebenza kwezivalo ukuze zixazulule noma yiziphi izinkinga ngaphambi komzamo.
Ukucushwa kwe-tandem kuthuthukisa ukuphepha kokusebenza ngokunikeza ukuphindaphinda okwengeziwe futhi kunciphisa izingozi ezihambisana noketshezi oluyingozi noma olunobuthi. Ngokuba ne-backup ethembekile uma kwenzeka ukwehluleka kwesivalo sokuqala, izivalo ezimbili zemishini zisebenza kahle ekusetshenzisweni okudinga amandla, ziqinisekisa ukuchitheka okuncane kanye nokuhambisana nezindinganiso eziqinile zemvelo.
Umehluko Phakathi Kwezimbozo Ezilodwa Nezimbili Zemishini
Umehluko phakathi kwezivalo zomshini ezilodwa nezimbili kuyinto ebalulekile okufanele icatshangelwe enqubweni yokukhetha izinhlelo zokusebenza ezahlukahlukene zezimboni. Izivalo zomshini ezilodwa ziqukethe izindawo ezimbili eziyisicaba ezishelelayo, enye inamathele esikhaleni semishini kanti enye inamathele kushafu ojikelezayo, enefilimu yoketshezi enikeza ukuthambisa. Lezi zinhlobo zezivalo zivame ukusetshenziswa ezisetshenzisweni lapho kungakhathazeki kangako ngokuvuza noma lapho ukuphatha inani elilinganiselwe lokuvuza koketshezi kungalawuleka.
Ngakolunye uhlangothi, izivalo ezimbili zemishini zakhiwe ngamabhangqa amabili ezivalo ezimbili ezisebenza ndawonye, ezinikeza izinga elengeziwe lokuvikelwa ekuvuthweni. Umklamo uhlanganisa ukuhlanganiswa kwesivalo sangaphakathi nesangaphandle: isivalo sangaphakathi sigcina umkhiqizo ngaphakathi kwepompo noma ku-mixer kuyilapho isivalo sangaphandle sivimbela ukungcola kwangaphandle ukuthi kungangeni futhi siqukethe noma yiluphi uketshezi olungaphuma esivaloni esiyinhloko. Izivalo ezimbili zemishini ziyathandwa ezimweni ezibhekene nemidiya eyingozi, enobuthi, enomfutho ophezulu, noma ehlanzekile ngoba zinikeza ukuthembeka okukhulu nokuphepha ngokunciphisa ingozi yokungcoliswa kwemvelo kanye nokuvezwa.
Isici esibalulekile okufanele siqashelwe ukuthi izivalo ezimbili zemishini zidinga uhlelo lokusekela oluyinkimbinkimbi kakhulu, okuhlanganisa uhlelo lwe-buffer noma lwe-barrier fluid. Lokhu kusetha kusiza ukugcina umehluko wokucindezela kuzo zonke izingxenye zophawu futhi kuhlinzeke ngokupholisa noma ukufudumala njengoba kudingeka kuye ngezimo zenqubo.
Ekuphetheni
Ekuphetheni, isinqumo phakathi kwezivalo zomshini ezi-single kanye nezi-double mechanical sibalulekile esisekelwe ezicini eziningana okuhlanganisa uhlobo loketshezi oluvalwayo, izinto ezicatshangelwayo zemvelo, kanye nezidingo zokugcinwa. Izivalo zomshini ezi-single zivame ukonga imali futhi kulula ukuzinakekela, kanti izivalo zomshini ezi-double zinikeza isivikelo esithuthukisiwe kokubili kubasebenzi kanye nemvelo lapho bephatha izinto eziyingozi noma ezinolaka.
Isikhathi sokuthunyelwe: Jan-18-2024